Director James Wan revealed at WonderCon during a panel for his upcoming film The Conjuring that he shot the film to be PG-13 like Insidious was. However, when the film was screened for the MPAA they deemed it "just too scary for PG-13" and slapped the film with an R-rating. Bear in mind this movie received this reaction without any gore and the MPAA didn't cite any scenes that could be removed to lower the rating down to PG-13.
Audiences at WonderCon were also screened footage from the film and the reactions have all been positive so far. There were also real victims and paranormal investigators from the original event present for the screenings and the panel.
I'm pretty excited for The Conjuring and seeing that this received such a rating for simply being too scary... I say bring it on.
The Conjuring stars Lili Taylor, Vera Farmiga, Patrick Wilson, and Mackenzie Foy. It is set for release on July 19, 2013.